Proxies tab in security settings not visible

I am trying to test the calendar overlay feature in iNotes.In Organisatin Policy → Mail Setting → iNotes tab → I have enable calendar subscription.

This gives me option to add calendar in iNotes full mode for google calendar.

Next I have to whitelist the google proxy in http-proxy servlet setting in security settings.

But when I go to Organisation policy → Security Settings → I can not see the Proxies tab, even in edit mode.

I have checked the design of pubnames.ntf and this tab is not there.

Is there a new template available for this?

Or how to enable it?